I am a first time buyer through Parts Geek and it was an uneventful experience. That was refreshing since I was not sure what to expect from them and had not heard about them before.
Check-out was very simple and straight forward with no push for more purchases nor any kind of "live person" follow-up calls to upsell or badger me.
Funny thing that I got the best deal straight from the website. I also tried a special deal through one of the coupon finder companies and their reported coupon was actually less of a deal than what was just directly available on the site.
I will happily buy again from PartsGeek and refer them for folks looking for good prices on auto parts.